Before Test Run; Using Remote Controller; Using Sw3 In Outdoor Unit - Mitsubishi Electric PUMY-SP.VKM serie Installationshandbuch

7. Test run

7.1. Before test run

After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power supply
or control wiring, wrong polarity, and no disconnection of one phase in the
supply.
Use a 500-volt M-ohm tester to check that the resistance between the power
supply terminals and ground is at least 1 M .
Do not carry out this test on the control wiring (low voltage circuit) terminals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1 M .
Insulation resistance
en
7.2. Test run

7.2.1. Using remote controller

About the restart protective mechanism
7.3. Refrigerant collecting (Pump down)
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Caution:
• The compressor will not operate unless the power supply phase connection
is correct.
• Turn on the power at least 12 hours before starting operation.
The followings must be checked as well.

7.2.2. Using SW3 in outdoor unit

Note:
In case of the test run from outdoor unit, all indoor units operate. Therefore,
you can not detect any erroneous connection of refrigerant pipes and the con-
necting wires. If it aims at detection of any erroneous connection, be sure to
carry out the test run from remote controller with reference to "7.2.1. Using
remote controller."
■ Test run (from the outdoor unit)
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Warning:
When pumping down the refrigerant, stop the compressor before disconnect-
ing the refrigerant pipes. The compressor may burst and cause injury if any
foreign substance, such as air, enters the system.
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